ground frost

British  

noun

1. the condition resulting from a temperature reading of 0°C or below on a thermometer in contact with a grass surface

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Example Sentences

And into Monday morning there could be a widespread ground frost as temperatures fall close to freezing.

From BBC

With winds falling lighter on Thursday night, temperatures will drop down to 3-6C with a touch of ground frost in more rural areas.

From BBC

Historical data from the Met Office shows the UK now sees about three weeks less of ground frost annually than it did 50 or 60 years ago.

From BBC

They did not dare remain in any one area too long, so rather than staying in the south of England, where a hard ground frost was the worst of their worries, they continued to meander up and down the country, braving a mountainside, where sleet pounded the tent; a wide, flat marsh, where the tent was flooded with chill water; and a tiny island in the middle of a Scottish loch, where snow half buried the tent in the night.

From Literature

But for us, the die-hard gardeners, spring is already here, even though we may have snow, an ice storm or two, and ground frost for another six weeks.”

From Washington Post